John h



Oct. 2, 1923.

J. H. GRAYsoN GAS HEATER Filed Jan. 22, 1925 mam m wam-m.

NS @N Patented Get. 2, 1923.

UNITE STATES ons H. emmen,

ING :narran-r,

GAS HEATER.

Application filed January 22, 1923. Serial No. @142174.

To all 'wiz 0 m it may concern Be it known that I, JOHN H. (Emerson, s citizen of the United States, residing at Athens, in the county of Athens and State of Ohio, have invented certain new and use ful Improvements in Gas Yi ieaters, of which the following a f-.liecificatioir This invention relates to gas heaters of `the type known as wall heaters.

Heaters of this type are set int.. wall or a partition between adjacent '2"514 uprights and secured to these uprights. The problem of satisfj-ing the requirements of the fire underwriters and at the same time producing a construction whieh is simple and practical is not easy. 1n the first instance the available space in a partition is not more than 45" deep while it is for practical rea-sons not desirahie to have a construction project. a substantial distance outwardly from the surface of the wall. These two limitingr conditions make it ditlicult to make a spatial disposition of the necessary heater elements and the support and at the same time atl'ord adequate fire protection.

It is the special ohiect of this invention to provide a gas heater of the wall heater type which satisfivs all practical conditions from the stand point of the user and at the same time meets io the fullest extent the reqtir@ ments of the tire undcrwrirrs and which` in addition, to meet a general desideratum, presents an ornan'lental construction.

For a full understanding of the invention. reference is made to the accompanying drawings in which-- Fig. 1 is a face view of a heater embodyn ing the invention;

Fig. 2 is a vertical section therethrciugh:l and Fig. 3 is a horizontal section on line 23--3, Fig. 2.

The heater A plurality upon a plate i1 helmv manifold l2 and the mixing tube 1?. The construction of these elements is of the usual type.

The construction of the heater includes an outer pan which ronsists of a hach i4. side is of the radiant mantle type. of mantles 10 are supported walls 15 at right angle thereto.. flaringr i: and bottoni walls 1G and iiapcs 17 ein .id- .ing laterallyv from the side nails 15.

Carried by this outer or main pau is a se@ ond pan compri .g u. 'rmt-.a is', iii-:ring side which-is disposed the.

Walls if) and a daring tot.: wail 2O3 the boi.- teifi being open to provide room for the manifold and mixing tube of the burner. The second pan is supported of: the main pan by means ot' brackets 21 the webs of which extend vertically. The second pan has ianges 2;: similar to the flanges 17 on the mein an.

ll/'ithin the second pan is disposed a third pan 'which has a back Wall 23, side walls 24 and a flaring top Wall 25, the bottom of which is formed by the late 11 which is connected to the side Wallis 24 by means 'of screws 26. 'he third pan is secured to the second pan by brackets 27 'which are like brackets 21.

A. inte plate 28 is secured to the arges 22 and a. face plate is secured to the aoe plate 28 and the tanges 22. The face plates have numerous perforations preferably in the form of radial slots 30.

The outer pan is set into a recess in a wall between adjacent uprights and the plaster 'is preferably removed in 'twnt of the u'rights so that the flanges 17 may be seater. against the wood. The edges 31 of the tace plate 29 are l)urned over projecting to the rear ot the plane of the flanges 17 to be seated against the plaster or Wall board as the case may be. The flanges 17 have openings through which the screws ma pass for securing the iianges 17 to the wal All three pans are lined with. asbestos hoard. The portion extending along the upper wall ofthe innermost pan extends slightly farther torn'ardly than the portions extending along the side walls 24 as shown in Fig. 2. The face plate 28 has a flaring inner edge 2S, The top Wall thereot overlaps slightly the lining 38 and makes a tight fit therewith while the tree edge of the side walls abuis against the edge of the asbestos lining. The side edges have recasses 28h sutiicient to permit the entrance ot air to the innermost pan to replace vthe alii' which is (continuously displaced under the effects of the heat, thereby avoiding; in terference ol" air currents. The reeesses 28 cooperate with the openinf i1 te allow' ad mission of' ali the air nece ry for c-oinpiete combustion and er reni isnt oft-l11 air displaced.

'flie--refwvsses 250 arel aise more Spf.- ially providedA for the purpose ofadmitting air to carry away the heat from the edge portion 28. The relatively cool air enters and is swept by the convection currents along the surface of the edge portion 28 thereby mitigatin the heat effects upon the latter.

Notwit standing the cooling action of such air as Hows in through the recesses 28", the face plate 28 is heated to a considerable extent. The face plate is therefore given relatively lar curved surface to provide a large radiating surface which is exposed to the cooling effect of the air sur rounding it and also to the cooling eii'ect of the alr passing upwardly through the interspace between the second and the third pan and out through the slots 30. Such eat as is inevitably transmitted through the walls of the innermost pan in spite of the astxastos lining causes the formation of convection currents promoting a continuous flow of air. The heat conducted from the edge portion 28El to the outer parts of the face plate 28 is thus carried oil' at a rela tively high rate.

The continuous replacement of the warm air by cool air entering from below prevents exoessive heating of the air in the inters'pace referred to. The interspace between the outer pan and the second pan is substantially cool and serves merely as safety zone thermally separating the heater from the wood work. In order to makethis thermal separation substantiall complete, the face plate 29 is Separate an independent of the face plate 28. As shown in Fig. 2 the two face plates are separated by an air space 34. The face plate 29 is supported together with the face plate 28 on the flanges 22, bolts 35 extending through both face plates and the flanges 22. On the inner surface of the face plate 29 are spac ing elements 36. The bolts are drawn up until the stops 36 are firmly pressed against the rim of the face plate 28 4so that the two face plates are mechanically equivalent to a single face plate. Thermally, however, the two face plates are separate since the heat conducted through the bolts 35 and the stops 36 is practically negligible and is dissipatcd as fast as it is transmitted, by the larve surface of the face plate 28 and carried away by the cool air currents passing through the interspace between the outer pan and the second pan.

It is thus seen that the outer pan and the face plate 29 are thermally insulated fron the remaining part. of the heater structure by a cool interspace.

Between the brackets 21 and the asbestos lining of the back 14 of the outer pan is preferably interposed an extra layer 37 of asbestos or other heat insulating material, as indicated'in Fig. 2.

Th;` gos intake pipe 3S extends through a hole in the bottom wall 16 of the outer pan and the valve control stem 39 projects 'iL-lemme through registering slots 30 of the two face plates.

By means of the arrangement described perfect insulation and fire protection is aforded and at the same time no part of the heater construction projects far into the room. The face plates being preferably white enameled cover the whole front except tlie radiant glowers 10. Whether the heater be in operation or not, the face plates and the set of glowers resent a unitary ornamental structure. ili'hile ordinarily the ornamental feature andell'ect upon the esthctic sense has no part in a mechanical combination, the ornamental' aspect in con- \`structions of this type mustbe considered and must qualify to a certain extent the mechanical arran ement. In this articular instance the prob emof `heat insu ation and the problem of ornamentation have been Vsolved interdependently so satisfy all requirements for a commercial and practical construction.

It will be observed that the glowers are disposed in a plane in front of the surface of the wall and that by means of the d portion 28 of the face plate 28 the heat 1s carried a substantial distance into the room so that no heated air currents can flow to the Wall.

The heater can be easily installed, easily inspected and easily removed.

To install the heater it is merely necessary to remove the face plate 29 so that the flanges 17 may be secured to the u rights. The face plate is separately secure to the anges 22 by means of bolts. After the heater is secured in place, the face plate 29 is secured to the face plate 28 as previously described.

I claim 1. A gas heater of the wall heater type,

comprising a set of radiant glower elements, a casing having aheat-insulating lining, surrounding'the set ofglowers, a second casing having a heat-insulating lining surrounding the first casing in spaced relation defining an interspace, ,a third casin having a heatinsulating lining, surroun ing the second casing in spaced relation defining an interspace, a face plate spanning the first and second casing and having a large number of perforations in communication with said first interspace, a second face late spanning .the second and third casing, iaving a large number of perforations in communication with the second interspace and presenting together with the iirst face plate the appearance of a single face plate, means for mechanically interconnecting the two face plates so that they are thermally substantially independent of each other, and mechanical connections between the casings offering substantially no resistance to the flow of air through thonterspaces.

lll)

2. Arrangement according to claim 1 in which the first face plate is curved defining a flaring edge portion extending outwardly from the free edge of the first casing, the edge adjoining the first casing having recesses admitting air from the first interspace to the glower space.

3. Arrangement according to claim 1 in which the inner edge of the second face plate is disposed forwardly of the outer edge of the first face plate and spaced a substantial distance therefrom and in which the means: for interconnecting the Atwo face plates include spacing elements for main taining a definite distance.

4. A gas heater of the wail heater type, comprising an outer casing open at its front and having lateral fianges at its front edge for attachment to a wall, another casing spaced from the said casing defining an int terspace, connections between the back of casing, said connections havin the first casing and the back of the second webs extending in vertical direction, a t ird casing spaced from the second casing and having at its front edge .lateral flanges, connections between the back of the second casing and the back of the third casing, said connections 'having webs extending in vertical direction.

a set of lowers mounted in the third casing, a face p ate bridging the front edges of the second and third casings and secured to the fanges of the former and a face plate bridging the first and second casings and secured to the first face plate.

5. Arrangements according to claim 4 in which the connection between the two face plates is such that they are thermally substantially separated from each other.

In testimony whereof, I affix my signature.

JOHN H. GRAYSON. 

